| 10x21 RC I | 8x21 RC I | |
|---|---|---|
| Binocular Type | Roof Prism | |
| Magnification | 10x | 8x |
| Objective Lens Diameter | 21mm | |
| Exit Pupil Diameter | 2.1mm | 2.6mm |
| Real Angle of View | 5.0-degree | 6.2-degree |
| Apparent Angle of View | 50.0-degree | 49.6-degree |
| Field of View at 1000 Yards | 261 ft. | 324 ft. |
| Relative Brightness | 4.4 | 6.9 |
| Eye Relief | 11mm | |
| Diopter Adjustment Range | Over ± 2m-1 | |
| Eye Interval Adjustment Range | 37-70mm | |
| Near Focus Distance | 8.2 ft. | 7.2 ft. |
| Weight | 6.9 oz. | |
| Dimensions | 4.1 in. (W) x 3.6 in. (H) x 1.6 in. (D) | |
| Lens Composition | 6 elements in 4 groups | |
| Coating | Fully Multi-Coated | |
| Features | n/a | |
